radium emanation

noun

, Chemistry.

1. (formerly) radon.

Word History and Origins

Origin of radium emanation¹

First recorded in 1900–05

Example Sentences

The element yields spontaneously radium emanation without any apparent diminution of its own mass.

From Project Gutenberg

Niton, or radium emanation, is one of the products of the disintegration of radium.

From Project Gutenberg

Mix very slowly and quietly in order not to release too much of the radium emanation.

From Project Gutenberg

Contact with radium emanation results in a deposit of the fatal radium-D, which in 40 years is but half removed.

From Project Gutenberg

The radium emanation is a gas about 111 times heavier than hydrogen; to this gas Sir William Ramsay has given the name niton.

From Project Gutenberg